Yes Bump keys can open around 90% of the doorways in America. Every lock manufacture In essence will have it’s personal bump key. When you have a Schlage or other lock then you should have a particular bump key made for that lock.
So principally there is just one bump key for a model or model of lock. The manufacturer of these locks don’t promote the bump keys keys. They sell blank keys to locksmiths or corporations with a key copying machine with good intentions but the dangerous guys then make bump keys from the blanks.